/*
 * (C) Copyright 2006-2011 Nuxeo SA (http://nuxeo.com/) and others.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Contributors:
 *     Nuxeo - initial API and implementation
 *
 * $Id: PermissionUIItemComparator.java 28304 2007-12-21 12:13:32Z ogrisel $
 */
package org.nuxeo.ecm.core.security;

import java.io.Serializable;
import java.util.Comparator;

/**
 * @author <a href="mailto:ogrisel@nuxeo.com">Olivier Grisel</a>
 */
public class PermissionUIItemComparator implements Comparator<PermissionUIItemDescriptor>, Serializable {

    private static final long serialVersionUID = 6468292882222351585L;

    @Override
    public int compare(PermissionUIItemDescriptor pid1, PermissionUIItemDescriptor pid2) {
        int diff = pid2.getOrder() - pid1.getOrder();
        if (diff == 0) {
            return 0;
        } else if (diff > 0) { // ascending order
            return -1;
        } else {
            return 1;
        }
    }

}
